The functionality for the R packet is provided in rsp_restart (). The start address of the current target is held in rsp.start_addr. The program counter is set to this address using set_npc () (see Section 4.6.5).

The processor is not unstalled, since there would be no way to regain control if this happened. It is up to the GDB client to restart execution (with continue or step if that is what is desired).

This packet should only be used in extended remote debugging.